Steam boiling apparatus



July 15, 1952 c. A. STEEN S'I EAM BOILING APPARATUS Filed Feb. 26, 1948f 9 6 7 s A INVENTOR jieerz,

ATTORNEYS Patented July 15, 1952 UNITED STATES PATENT OFFICE Carl AugustSteen, Getinge, Sweden Application February 26, 1948, Serial No. 11,247In Sweden January 13, 1947 (C1. ZN-40) Claims.

This invention relates generally to a steam boiling apparatus, and moreparticularly to an apparatus comprising range top having a cooking holefor a detachable boiling vessel immersed therein.

One object of the invention is to provide a sealing device for theboiling vessel which firmly prevents leakage of steam between theboiling vessel and the edge of the cooking hole.

Another object is to provide a locking device for the boiling vesselcapable of preventing the pressure of the steam in contact with theboiling vessel to rise above a predetermined value.

A further object is to obtain a locking device for the boiling vesselwhich is easy to operate, which is small and compact and simple in construction.

The accompanying drawing shows, for the purpose of illustrating thepresent invention, a preferred embodiment in which the invention maytake form, it being understood that the drawing is illustrative of theinvention rather than limiting the same.

In the drawing:

. Figure 1 is a vertical section through the looking device and thesealing device.

Figure 2 is a plan View of the locking device.

. Figure 3 is a side view thereof.

Figure 4 is a small scale vertical sectional view through one of thecooking wells, illustrating the general organization of parts.

The steam boiling apparatus, illustrated in the drawing is provided witha range top having one I or more'cooking holes l5- therein, the edges Inof which are engaged by a sealing ring ll of rubber or other elasticmaterial. A boiling vessel I2 provided with an outstanding flange I3 isinserted in the cooking hole 15 illustrated and rests with its flange I3on the sealing ring H, against which the flange is pressed by a rotarypawl 8 formed as a lifting hook. As indicated in the drawing by the walll4 welded to the under side of the range top I a steam jacket [4encloses the cooking vessel, and the steam may be generated therein byelectrodes it in water or may be supplied from the outside.

A tube 2 passing through the range top I and welded thereto has its mainportion beneath the range top. The portion extending above the top isthreaded on the outside as at 2 and is provided with a cover 3 providedwith interior screw threads 3 which by means of a wrench may be drawntight and thereby locked against the top. The cover 3 has a centralopening which forms an upper slide guide for a spindle 4 with a sleeve5. A washer 6 on the spindle exerts a pressure against the sleeve bymeans of a nut I, and the sleeve presses the rotary pawl 8 against thecountersunk head of the spindle 4. Two helical springs 9 in the tube 2rest with the ends against the washer 6 and the cover 3 thereby pressingthe rotary pawl downwards against the flange [3. The rotary pawl maythus be turned round. together with the spindle to be resiliently movedover the flange so that this is pressed against the sealing ring with apressure determined by the springs. When the pawl 8 is lifted the washer5 serves as the lower guide of the spindle 4.

The pressure of the springs is adjusted to resist the normal pressure onthe boiling vessel, but if the steam pressure by any occurring faultshould rise to an injurious value the rotary pawls are lifted by thesteam so that the excess of steam may escape thereby preventingaccidents and damage to the boiling apparatus.

I claim:

1. An electric steam boiling apparatus, comprising a range top having anopening therein, a steam jacket secured to the lower surface of saidtop, a removable boiling vessel having a flange extending laterally fromits side wall, said vessel extending through said opening in said topinto said steam jacket, steam generating electrodes mounted in saidsteamjacket, a sealing ring of an elastic material extending along theedge of the opening of said top and having an inwardly directed sealingflange adapted to be pressed by the steam pressure against the lowersurface of said projecting flange, a plurality of pawls each mounted ona vertical, slidably and turnably mounted spindle and adapted to beturned over said projecting flange, said shaft passing through said topand being spring-loaded so as to press the pawl against said projectingflange.

2. An electric steam boiling apparatus, comprising a range top having anopening therein, a steam jacket secured to the lower surface of saidtop, a removable boiling vessel having a flange extending laterally fromits side wall, said vessel extending through said opening in said topinto said steam jacket, steam generating electrodes mounted in saidsteam jacket, a sealing ring of an elastic material extending along theedge of the opening of said top and having an inwardly directed sealingflange adapted to be pressed by the steam pressure against the lowersurface of said projecting flange, a plurality of pawls each mounted ona vertical, slidably and turnably mounted spindle and adapted to beturned over said projecting flange, said shaft passing through 3 saidtop, a spring casing for each pawl secured to and extending below saidtop for receiving said spindle, and a helical spring encompassing saidspindle within said casing for pressing the appending pawl against saidprojecting flange.

3. An electric steam boiling apparatus, comprising a range top having anopening therein, a steam jacket secured to the lower surface of saidtop, a removable boiling vessel having a flange extending laterally fromits side Wall, said vessel extending through said opening in said topinto said steam jacket, steam generating electrodes mounted in saidsteam jacket, a sealing ring of an elastic material extending along theedge of the opening of said top and having an inwardly directed sealingflange adapted to be pressed by the steam pressure against the lowersurface of said projecting flange, a plurality of pawls each mounted ona vertical, slidably and turnably mounted spindle and adapted to beturned over said projecting flange, said shaft passing through said top,a spring casing for each pawl secured to and extending below said topfor receiving and guiding said spindle, and a helical springencompassing said spindle within said casing for pressing the appendingpawl against said projecting flange, said spring bearing at its upperend against a fixed portion of the spring casing and at its lower endagainst a lug on the spindle.

4. An electric steam boiling apparatus, comprising a range top having anopening therein, a steam jacket secured to the lower surface of saidtop, a removable boiling vessel having a flange extending laterally fromits side wall, said vessel extending through said opening in said topinto said steam jacket, steam generating electrodes mounted in saidsteam jacket, a sealing ring of an elastic material extending along theedge of the opening of said top and having an inwardly directed sealingflange adapted to be pressed by the steam pressure against the lowersurface of said projecting flange, a plurality of pawls each mounted ona vertical, slidably, and turnably mounted spindle and adapted to beturned over said projecting flange, said shaft passing through said top,a spring casing for each pawl extending through the top and fastenedthereto, a cover for said spring casing threadedly engaged with theupper portion of the spring casing above the top, said cover having acentral opening serving as a guide for said spindle which passes throughsaid opening into said spring casing, a helical spring casingencompassing the spindle, and a lug on said 4 spindle, said springbearing at its upper end against said casing cover and its lower endagainst said lug.

5. An electric steam boiling apparatus, comprising a range top having anopening therein, a. steam jacket secured to the lower surface of saidtop, a removable boiling vessel having a flange extending laterally fromits side Wall, said vessel extending through said opening in said topinto said steam jacket, steam generating electrodes mounted in saidsteam jacket, a sealing ring of an elastic material extending along theedge of the opening of said top and having an inwardly directed sealingflange adapted to be pressed by the steam pressure against the lowersurface of said projecting flange, a plurality of pawls each mounted ona vertical, slidably and turnably mounted spindle and adapted to beturned over said projecting flange, said shaft passing through said top,a spring casing for each pawl extending through the top and fastenedthereto, a cover for said spring casing threadedly engaged with theupperportion of the spring casing above the top, said cover having a centralopening serving as a guide for said spindle which passes through saidopening into said spring casing, a helical spring in said spring casingencompassing the spindle, and a sleeve on said spindle pressing the pawlagainst an upper head of the spindle by means of a nut on the lower endof the spindle, said spring bearing at its upper end against said casingcover and at its lower end against said nut.

CARL AUGUST STEEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 80,881 Smith et al. Aug. 11, 18681,241,619 Goeeke Oct. 2, 1917 1,290,378 Sibley Jan. 7, 1919 1,467,141Demuth Sept. 4, 1923 1,964,805 Barnes July 3, 1934 2,054,857 GorslineSept. 22, 1936 2,288,312 Brown June 30, 1942 FOREIGN PATENTS NumberCountry Date 2,059 Great Britain of 1901 17,964 Great Britain of 191178,264 Sweden Aug. 26, 1936 100,884 Swden Feb. 18, 1941

